That's a value that reflects reality. I.e. it cannot be changed. A better method would be to increase the number of deactivations allowed based on the number of deactivations used plus some margin you want to allow.
Reset number of deactivations
I plan to use LimeLM for subscription model. I'd like to reset "Deactivations used" after the user renews the license every year (I change the custom features to update expiration date and so on..). But can't find a way to reset "Deactivations used". Is there some?